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    <title>Document</title>
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//         for(var a=100;a<=999;a++){
// if(a%111==0){
//     box=box+a
// }
//         }
//         console.log(box);
var str = "";
var xx=0;
        for(var i=0;i<4;i++){
        str=str+"1";
        xx=parseInt(str)+xx;
        }
console.log(xx);

    </script>
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